Aplane is flying at an altitude of 32,000 feet. the distance between the plane and a radio tower on the ground is 50,000 feet. what is the angle of depression between the plane and radio tower (round to 1 decimal place)? a) 0.6° b) 0.7° c) 32.6° d) 39.8°

Assume that there is a 11% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?